Gamma-ray Burst 161007A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:26:59 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.390d {+06h 53m 34s} (J2000),
                 103.644d {+06h 54m 35s} (current),
                 102.633d {+06h 50m 32s} (1950)
GRB_DEC:         +23.289d {+23d 17' 20"} (J2000),
                 +23.267d {+23d 16' 02"} (current),
                 +23.352d {+23d 21' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1980 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        17668 TJD;   281 DOY;   16/10/07
GRB_TIME:        77143.02 SOD {21:25:43.02} UT
GRB_PHI:          47.22 [deg]
GRB_THETA:        18.20 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.47 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0  +4  +0 
SUN_POSTN:       193.85d {+12h 55m 24s}   -5.92d {-05d 55' 24"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.48d {+18h 01m 56s}  -18.50d {-18d 29' 44"}
MOON_DIST:       166.82 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.18, 10.83 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.28,  0.42 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 111.82,-2.76 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:28:19 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.4069d {+06h 53m 37.65s} (J2000),
                 103.6608d {+06h 54m 38.59s} (current),
                 102.6493d {+06h 50m 35.84s} (1950)
GRB_DEC:         +23.3073d {+23d 18' 26.2"} (J2000),
                 +23.2855d {+23d 17' 07.6"} (current),
                 +23.3701d {+23d 22' 12.2"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.56e-09 [erg/cm2/sec]
GRB_SIGNIF:      7.87 [sigma]
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77267.88 SOD {21:27:47.88} UT,   124.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.68 237.21 261.62 243.68
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       193.85d {+12h 55m 24s}   -5.92d {-05d 55' 26"}
SUN_DIST:         92.51 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.49d {+18h 01m 59s}  -18.50d {-18d 29' 45"}
MOON_DIST:       166.81 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.17, 10.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.30,  0.44 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.43 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:28:29 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.4069d {+06h 53m 37.6s} (J2000),
                 103.6608d {+06h 54m 38.5s} (current),
                 102.6493d {+06h 50m 35.8s} (1950)
GRB_DEC:         +23.3073d {+23d 18' 26.2"} (J2000),
                 +23.2855d {+23d 17' 07.6"} (current),
                 +23.3701d {+23d 22' 12.2"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       62 [cnts]
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77267.88 SOD {21:27:47.88} UT,   124.9 [sec] since BAT Trigger Time
CENTROID_X:      301.66,  raw= 302  [pixels]
CENTROID_Y:      332.13,  raw= 332  [pixels]
ROLL:            95.28 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   80.94
GRB_POS_XRT_Z:   -8.55
IMAGE_URL:       sw00716127000msxps_rw.img
SUN_POSTN:       193.85d {+12h 55m 24s}   -5.92d {-05d 55' 26"}
SUN_DIST:         92.51 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.50d {+18h 01m 59s}  -18.50d {-18d 29' 45"}
MOON_DIST:       166.81 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.17, 10.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.30,  0.44 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:28:38 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.4069d {+06h 53m 37.6s} (J2000),
                 103.6608d {+06h 54m 38.5s} (current),
                 102.6493d {+06h 50m 35.8s} (1950)
GRB_DEC:         +23.3073d {+23d 18' 26.2"} (J2000),
                 +23.2855d {+23d 17' 07.6"} (current),
                 +23.3701d {+23d 22' 12.2"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       62 [cnts]
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77267.88 SOD {21:27:47.88} UT,   124.9 [sec] since BAT Trigger Time
CENTROID_X:      301.66,  raw= 302  [pixels]
CENTROID_Y:      332.13,  raw= 332  [pixels]
ROLL:            95.28 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   80.94
GRB_POS_XRT_Z:   -8.55
IMAGE_URL:       sw00716127000msxps_rw.img
SUN_POSTN:       193.85d {+12h 55m 24s}   -5.92d {-05d 55' 26"}
SUN_DIST:         92.51 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.50d {+18h 01m 59s}  -18.50d {-18d 29' 45"}
MOON_DIST:       166.81 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.17, 10.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.30,  0.44 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:29:34 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.390d {+06h 53m 34s} (J2000),
                 103.644d {+06h 54m 35s} (current),
                 102.633d {+06h 50m 32s} (1950)
GRB_DEC:         +23.289d {+23d 17' 20"} (J2000),
                 +23.267d {+23d 16' 02"} (current),
                 +23.352d {+23d 21' 06"} (1950)
GRB_DATE:        17668 TJD;   281 DOY;   16/10/07
GRB_TIME:        77143.02 SOD {21:25:43.02} UT
TRIGGER_INDEX:   20000
GRB_PHI:          47.22 [deg]
GRB_THETA:        18.20 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.47 [sigma]
LC_URL:          sw00716127000msb.lc
SUN_POSTN:       193.85d {+12h 55m 24s}   -5.92d {-05d 55' 27"}
SUN_DIST:         92.53 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.51d {+18h 02m 01s}  -18.50d {-18d 29' 46"}
MOON_DIST:       166.84 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.18, 10.83 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.28,  0.42 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 111.82,-2.76 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:31:04 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.402d {+06h 53m 36s} (J2000)
POINT_DEC:       +23.284d {+23d 17' 03"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77276.32 SOD {21:27:56.32} UT,   133.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.887
N_STARS:         190
X_OFFSET:        392 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1351 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00716127000msufc0133.fits
SUN_POSTN:       193.85d {+12h 55m 25s}   -5.92d {-05d 55' 28"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.52d {+18h 02m 04s}  -18.50d {-18d 29' 47"}
MOON_DIST:       166.84 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:31:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.402d {+06h 53m 36s} (J2000)
POINT_DEC:       +23.284d {+23d 17' 03"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77276.32 SOD {21:27:56.32} UT,   133.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.887
N_STARS:         190
X_OFFSET:        392 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1351 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00716127000msufc0133.fits
SUN_POSTN:       193.85d {+12h 55m 25s}   -5.92d {-05d 55' 29"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.52d {+18h 02m 05s}  -18.50d {-18d 29' 48"}
MOON_DIST:       166.84 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:32:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.402d {+06h 53m 36s} (J2000)
POINT_DEC:       +23.284d {+23d 17' 03"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77276.32 SOD {21:27:56.32} UT,   133.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     497568493
X_OFFSET:        729 [pixels]
Y_OFFSET:        738 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       889
Y_GRB_POS:       898
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0150.fits
SUN_POSTN:       193.85d {+12h 55m 25s}   -5.93d {-05d 55' 30"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.53d {+18h 02m 08s}  -18.50d {-18d 29' 49"}
MOON_DIST:       166.85 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:33:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.402d {+06h 53m 36s} (J2000)
POINT_DEC:       +23.284d {+23d 17' 03"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77276.32 SOD {21:27:56.32} UT,   133.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     497568493
X_OFFSET:        729 [pixels]
Y_OFFSET:        738 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       889
Y_GRB_POS:       898
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0150.fits
SUN_POSTN:       193.85d {+12h 55m 25s}   -5.93d {-05d 55' 30"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.54d {+18h 02m 09s}  -18.50d {-18d 29' 49"}
MOON_DIST:       166.86 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:39:13 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.286d {+23d 17' 11"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77434.38 SOD {21:30:34.38} UT,   291.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.175
N_STARS:         152
X_OFFSET:        409 [pixels]
Y_OFFSET:        418 [pixels]
X_MAX:           1368 [pixels]
Y_MAX:           1377 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00716127000msufc0291.fits
SUN_POSTN:       193.86d {+12h 55m 26s}   -5.93d {-05d 55' 36"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.59d {+18h 02m 22s}  -18.50d {-18d 29' 54"}
MOON_DIST:       166.90 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:39:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.286d {+23d 17' 11"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77434.38 SOD {21:30:34.38} UT,   291.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.175
N_STARS:         152
X_OFFSET:        409 [pixels]
Y_OFFSET:        418 [pixels]
X_MAX:           1368 [pixels]
Y_MAX:           1377 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00716127000msufc0291.fits
SUN_POSTN:       193.86d {+12h 55m 26s}   -5.93d {-05d 55' 36"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.59d {+18h 02m 22s}  -18.50d {-18d 29' 54"}
MOON_DIST:       166.90 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:40:38 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.286d {+23d 17' 11"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77434.38 SOD {21:30:34.38} UT,   291.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     497568651
X_OFFSET:        729 [pixels]
Y_OFFSET:        738 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       889
Y_GRB_POS:       898
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0308.fits
SUN_POSTN:       193.86d {+12h 55m 26s}   -5.93d {-05d 55' 37"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.60d {+18h 02m 25s}  -18.50d {-18d 29' 55"}
MOON_DIST:       166.91 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:40:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.286d {+23d 17' 11"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77434.38 SOD {21:30:34.38} UT,   291.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     497568651
X_OFFSET:        729 [pixels]
Y_OFFSET:        738 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       889
Y_GRB_POS:       898
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0308.fits
SUN_POSTN:       193.86d {+12h 55m 26s}   -5.93d {-05d 55' 38"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.61d {+18h 02m 25s}  -18.50d {-18d 29' 55"}
MOON_DIST:       166.91 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #20008
V. D'Elia (ASDC), L. M. Z. Hagen (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team:
At 21:25:43 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 161007A (trigger=716127). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 103.390, +23.289 which is
```
   RA(J2000) = 06h 53m 34s
   Dec(J2000) = +23d 17' 20"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 60 sec. The peak count rate was ~600 counts/sec (15-350 keV), at ~30 sec after the trigger.
The XRT began observing the field at 21:27:47.8 UT, 124.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 103.40706, 23.30639 which is equivalent to:
```
   RA(J2000)  = 06h 53m 37.69s
   Dec(J2000) = +23d 18' 23.0"
```
with an uncertainty of 4.3 arcseconds (radius, 90% containment). This location is 84 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time. No spectrum from the promptly downlinked event data is yet available to determine the column density.
The initial flux in the 2.5 s image was 1.56e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 133 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.12.
Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:45:59 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.287d {+23d 17' 12"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  78015.23 SOD {21:40:15.23} UT,   872.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.509
N_STARS:         190
X_OFFSET:        169 [pixels]
Y_OFFSET:        178 [pixels]
X_MAX:           1608 [pixels]
Y_MAX:           1617 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00716127000msufc0872.fits
SUN_POSTN:       193.86d {+12h 55m 27s}   -5.93d {-05d 55' 42"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.65d {+18h 02m 36s}  -18.50d {-18d 29' 59"}
MOON_DIST:       166.95 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:46:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.287d {+23d 17' 12"} (J2000)
POINT_ROLL:      95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  78015.23 SOD {21:40:15.23} UT,   872.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.509
N_STARS:         190
X_OFFSET:        169 [pixels]
Y_OFFSET:        178 [pixels]
X_MAX:           1608 [pixels]
Y_MAX:           1617 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00716127000msufc0872.fits
SUN_POSTN:       193.86d {+12h 55m 27s}   -5.93d {-05d 55' 43"}
SUN_DIST:         92.53 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.65d {+18h 02m 37s}  -18.50d {-18d 29' 59"}
MOON_DIST:       166.96 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:46:34 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     716127,   Seg_Num: 0
GRB_RA:          103.4094d {+06h 53m 38.25s} (J2000),
                 103.6633d {+06h 54m 39.19s} (current),
                 102.6519d {+06h 50m 36.44s} (1950)
GRB_DEC:         +23.3067d {+23d 18' 24.1"} (J2000),
                 +23.2848d {+23d 17' 05.4"} (current),
                 +23.3695d {+23d 22' 10.1"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  77504.00 SOD {21:31:44.00} UT,   361.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       193.86d {+12h 55m 27s}   -5.93d {-05d 55' 43"}
SUN_DIST:         92.52 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.65d {+18h 02m 37s}  -18.50d {-18d 30' 00"}
MOON_DIST:       166.95 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.17, 10.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.30,  0.44 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:47:37 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.287d {+23d 17' 12"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  78015.23 SOD {21:40:15.23} UT,   872.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     497569232
X_OFFSET:        728 [pixels]
Y_OFFSET:        737 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       888
Y_GRB_POS:       897
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0889.fits
SUN_POSTN:       193.86d {+12h 55m 27s}   -5.93d {-05d 55' 44"}
SUN_DIST:         92.53 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.66d {+18h 02m 39s}  -18.50d {-18d 30' 00"}
MOON_DIST:       166.97 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 07 Oct 16 21:47:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     716127,   Seg_Num: 0
POINT_RA:        103.404d {+06h 53m 37s} (J2000)
POINT_DEC:       +23.287d {+23d 17' 12"} (J2000)
ROLL:            95.277d
IMG_START_DATE:  17668 TJD;   281 DOY;   16/10/07
IMG_START_TIME:  78015.23 SOD {21:40:15.23} UT,   872.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     497569232
X_OFFSET:        728 [pixels]
Y_OFFSET:        737 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       888
Y_GRB_POS:       897
BINNING_INDEX:   1
IM_URL:          sw00716127000msuni0889.fits
SUN_POSTN:       193.86d {+12h 55m 27s}   -5.93d {-05d 55' 44"}
SUN_DIST:         92.53 [deg]   Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN:      270.67d {+18h 02m 40s}  -18.50d {-18d 30' 00"}
MOON_DIST:       166.97 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      192.19, 10.84 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.29,  0.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #20009
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, N.Shatskiy, P.Balanutsa, A.Kuznetsov, V.V.Chazov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinsky, I.Zalozhnih, A. Popov Ural Federal University, Yekaterinburg, Kourovka
R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA)
H. Levato, C. Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB161007A 38 sec after notice time and 114 sec after trigger time at 2016-10-07 21:27:42 UT in two polarizations. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box (ra=06 53 33 dec=+23 17 20 r=0.050000). The 5-sigma upper limit has been about 17.0 mag. The observations made on zenit distance = 33 degrees, galaxy latitude b = 11 degree. The moon (38 % bright part) below the horizon (The altitude of the Moon is -56 degree ).
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB161007A 33 sec after notice time and 109 sec after trigger time at 2016-10-07 21:27:36 UT in two polarizations.. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 17.0 mag. The observations made on zenit distance = 68 degrees, galaxy latitude b = 11 degree. The moon (38 % bright part) below the horizon (The altitude of the Moon is -28 degree ).
The message may be cited.
GCN Circular #20010
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 161007A, we find an enhanced XRT position of the afterglow: RA, Dec: 103.4092, 23.3068 which is equivalent to:
```
   RA (J2000)  = 06 53 38.21
   Dec (J2000) = +23 18 24.6
```
with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/716127.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #20013
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 2452 s of XRT Photon Counting mode data and 5 UVOT images for GRB 161007A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 103.40903, +23.30704 which is equivalent to:
```
RA (J2000): 06h 53m 38.17s
Dec (J2000): +23d 18' 25.4"
```
with an uncertainty of 2.2 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #20014
A. de Ugarte Postigo (IAA-CSIC), D. A. Kann (TLS Tautenburg), L. Izzo, C. C. Thoene (both IAA-CSIC), N. Castro-Rodriguez, and G. Gomez Velarde (GRANTECAN/IAC/Universidad de La Laguna) report:
We observed the field of GRB 161007A (Swift 716127, D'Elia et al., GCN #20008), with the 10.4m GTC on La Palma, Canary Islands, Spain. We obtained four 30 sec images in the Sloan i' band at an airmass of 1.8. The midtime of our observations was 0.2228 days after the GRB trigger.
At the UVOT-enhanced Swift XRT position (Goad et al., GCN #20013), we detect a source at the edge of the error circle, at:
```
RA (J2000) =3D     06:53:38.10
Dec. (J2000) =3D +23:18:24.6
```
For this source, we measure:
i=E2=80=99 (Vega) =3D 22.23 +/- 0.15=20
The photometric calibration was done by comparing to USNOB-1.0 stars in the I-band filter, therefore this is only a preliminary value. No statement can be made about fading. We note that the X-ray spectrum of this GRB's afterglows shows evidence for excess absorption, therefore this may be a dark GRB, with this source being its host galaxy. The source looks extended in our image, which has a seeing of 1.2".
GCN Circular #20015
T.G.R. Roegiers (PSU), L.M. McCauley (PSU), J.A. Kennea (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB) and V. D'Elia report on behalf of the Swift-XRT team:
We have analysed 7.4 ks of XRT data for GRB 161007A (D'Elia et al. GCN Circ. 20008), from 114 s to 24.7 ks after the BAT trigger. The data comprise 228 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 20010).
The late-time light curve (from T0+5.0 ks) can be modelled with a power-law decay with a decay index of alpha=0.8 (+/-0.4).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.69 (+/-0.09). The best-fitting absorption column is 7.5 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 1.7 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.65 (+0.25, -0.23) and a best-fitting absorption column of 5.5 (+1.9, -1.6) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.1 x 10^-11 (7.0 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.5 (+1.9, -1.6) x 10^21 cm^-2
Galactic foreground: 1.7 x 10^21 cm^-2
Excess significance: 4.0 sigma
Photon index:	     1.65 (+0.25, -0.23)
```
If the light curve continues to decay with a power-law decay index of 0.8, the count rate at T+24 hours will be 3.1 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.6 x 10^-13 (2.2 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00716127.
This circular is an official product of the Swift-XRT team.
GCN Circular #20016
L. M. Z. Hagen (PSU) and V. D'Elia (ASDC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161007A 133 s after the BAT trigger (D'Elia et al., GCN Circ. 20008). No optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 20013) or the possible GTC optical counterpart (de Ugarte Postigo et al., GCN Circ. 20014) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white              133         1716          411         >20.79
v                  621         1593          116         >18.39
b                  547         1691          116         >19.26
u                  291         1666          343         >19.73
uvw1               671         1642          116         >18.69
uvm2               646         1617          116         >18.81
uvw2               596         1735          129         >19.04
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.12 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #20017
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), V. D'Elia (ASDC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 161007A (trigger #716127) (D'Elia, et al., GCN Circ. 20008). The BAT ground-calculated position is RA, Dec = 103.408, 23.289 deg which is
```
    RA(J2000)  =  06h 53m 37.9s
    Dec(J2000) = +23d 17' 18.8"
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 87%.
The mask-weighted light curve shows a peak starting from T+20 sec, peaking at T+40 sec and ending at T+100 sec. There is a hint of an extended emission up to T+250 sec. T90 (15-350 keV) is 201.7 +- 40.3 sec (estimated error including systematics).
The time-averaged spectrum from T+18.2 to T+105.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.46 +- 0.18. The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+33.81 sec in the 15-150 keV band is 0.4 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/716127/BA/
GCN Circular #20018
E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI), I. Korobtsev (ISTP) report on behalf of larger GRB follow-up collaboration:
We observed the field of the the GRB 161007A (D'Elia et al., GCN 20008) with AZT-33IK telescope of Sayan observatory (Mondy) starting on October, 07 (UT) 21:51:45. We obtained several images in R-filter. Within XRT error circle (Goad et al., GCN 20013) we do not detected any source. Preliminary photometry of the field is following
```
Date        UT start   t-T0      Filter Exp.   OT   UpLim (3 sigma)
                       (mid, days)       (s)

2016-10-07  21:51:45   0.03025   R      35*60  n/d  21.5
```
Photometry is based on nearby USNO-B1.0 stars
```
USNO-B1         R2
1133-0144160    15.67
1133-0144193    15.95
1133-0144230    14.48
```
GCN Circular #20019
E. Mazaeva (IKI), R. Inasaridze (AbAO), A. Pozanenko (IKI), A. Volnova (IKI), V. Ayvazian (AbAO), V. Zhuzhunadze, (AbAO), O.Kvaratskhelia (AbAO), G. Inasaridze (AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 161007A (D'Elia et al., GCN 20008) with AS-32 (0.7m) telescope of Abastumani Observatory on October, 07 (UT) 22:14:13. We obtained several unfiltered images of the field. Within XRT error circle (Goad et al., GCN 20013) we do not detected optical afterglow candidate (de Ugarte Postigo et al., GCN 20014). Preliminary photometry of the field is following
```
Date        UT start   t-T0      Filter Exp.   OT   UpLim (3 sigma)
                       (mid, days)       (s)

2016-10-07  22:14:13   0.05758   CR     37*60  n/d  22.4
```
Photometry is based on nearby USNO-B1.0 stars
```
USNO-B.1_id R2
1133-0144160    15.67
1133-0144193    15.95
1133-0144230    14.48
1133-0144267    15.92
1133-0144281    15.23
```
GCN Circular #20020
K. E. Heintz (Univ. of Iceland and DARK/NBI), D. Malesani (DARK/NBI and DTU Space), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI), T. Pursimo (NOT), T. Kruehler (MPE Garching), J. Telting (NOT) and J. P. U. Fynbo (DARK/NBI) report on behalf of a larger collaboration:
We observed the field of GRB 161007A (D'Elia et al., GCN 20008) using the ALFOSC camera mounted at the 2.56m Nordic Optical Telescope (NOT). Observations started at 04:39:59 UT on 2016-10-09 (i.e., 31 hr after the trigger) and 6x300 s SDSS i-band frames were obtained under excellent seeing (0.6-0.7").
In our stacked i-band image, we clearly detect the object reported by de Ugarte Postigo et al. (GCN 20014). We confirm that this source is extended.
No significant variability is measured with respect to the GTC images (taken 5.3 hr after the GRB) down to ~0.2 mag. The extension, the lack of variability, and the low chance probability association for such a bright object all indicate that this is the host galaxy of GRB 161007A.
GCN Circular #20083
K. P. Mooley (Hintze Fellow, Oxford), T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), D. Titterington, S. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB 161007A (D'Elia et al., GCN 20008) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Oct 08.05, Oct 09.25, Oct 11.25 and Oct 15.25 (UT) do not reveal any radio source at the XRT location (Goad et al., GCN 20013), with 3sigma upper limits of 372 uJy, 273 uJy, 333 uJy and 222 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.

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Jochen Greiner, last update: 20-Oct-2016 [Disclaimer]